Table 1.
Demographic and Clinical Variables in Stroke Across Study Groupsa
| Variable | Age Groups |
||
|---|---|---|---|
| Young | Midlife | Older | |
| Stroke (N=11,381,390), no. (%) | 648,853 (5.7) | 3,148,862 (27.7) | 7,583,675 (66.6) |
| Stroke subtypes, no. (%) | |||
| Hemorrhagic stroke | 232,685 (35.9) | 746,297 (23.7) | 1,393,401 (18.4) |
| Ischemic stroke | 416,168 (64.1) | 2,402,565 (76.3) | 6,190,274 (81.6) |
| Demographic characteristics | |||
| Age (y), median (interquartile range) | 38 (32-42) | 57 (52-61) | 79 (72-85) |
| Female sex, no. (%) | 316,349 (48.8) | 1,356,485 (43.1) | 4,239,664 (55.9) |
| Race, no. (%) | |||
| White | 280,513 (51.0) | 1,577,611 (58.4) | 4,878,285 (75.6) |
| Black | 144,786 (26.3) | 663,286 (24.6) | 767,825 (11.9) |
| Hispanic | 79,451 (14.4) | 272,158 (10.1) | 434,061 (6.7) |
| Others | 45,428 (8.3) | 188,528 (7.0) | 372,510 (5.8) |
| Comorbid conditions, no. (%) | |||
| Hypertension | 285,357 (45.0) | 2,230,605 (72.5) | 5,664,427 (76.5) |
| Diabetes mellitus | 106,987 (16.9) | 1,085,248 (35.2) | 2,299,152 (31.1) |
| Smoking | 157,436 (24.3) | 819,978 (26.0) | 528,627 (7.0) |
| Alcoholism | 45,622 (7.2) | 271,611 (8.8) | 169,193 (2.3) |
| Heart failure | 50,616 (7.8) | 376,819 (12.0) | 1,493,850 (19.7) |
| Migraine | 17,503 (2.7) | 91,937 (2.9) | 130,712 (1.7) |
| Previous stroke | 51,859 (8.0) | 423,873 (13.5) | 1,184,302 (15.6) |
| Cancer | 27,427 (4.2) | 164,192 (5.2) | 428,556 (5.7) |
| Metastatic cancer | 12,581 (1.9) | 105,533 (3.4) | 198,774 (2.6) |
| Coronary artery disease | 27,928 (4.3) | 526,981 (16.7) | 2,075,762 (27.4) |
| Chronic lung disease | 50,629 (8.0) | 437,259 (14.2) | 1,232,923 (16.7) |
| Vascular disease | 37,981 (6.0) | 220,963 (7.2) | 684,907 (9.3) |
| Anemia | 78,493 (12.4) | 350,164 (11.4) | 1,040,623 (14.1) |
| Coagulopathy | 45,757 (7.2) | 179,989 (5.9) | 360,478 (4.9) |
| Atrial fibrillation/flutter | 18,713 (2.9) | 273,159 (8.7) | 2,233,581 (29.5) |
| Liver cirrhosis | 7,977 (1.2) | 56,646 (1.8) | 46,239 (0.6) |
| Long-term dialysis/end-stage renal disease | 17,503 (2.7) | 91,937 (2.9) | 130,712 (1.7) |
| Intravenous drug use | 54,148 (8.3) | 136,123 (4.3) | 2,3587 (0.3) |
| Insurance/payer, no. (%) | |||
| Medicare | 61,152 (9.5) | 616,972 (19.6) | 6,736,387 (88.9) |
| Medicaid | 176,252 (27.2) | 594,758 (18.9) | 118,907 (1.6) |
| Private insurance | 279,426 (43.2) | 1,401,584 (44.6) | 580,990 (7.7) |
| Self-pay | 92039 (14.2) | 347932 (11.1) | 50123 (0.7) |
| No charge/others | 37950 (5.9) | 179329 (5.7) | 88485 (1.2) |
| Household income, no. (%) | |||
| 0-25th percentile | 202,581 (32.1) | 1,013,034 (33.0) | 1,956,900 (26.3) |
| 26th-50th percentile | 162,419 (25.7) | 792,401 (25.8) | 1,935,811 (26.0) |
| 51st-75th percentile | 144,440 (22.9) | 690,366 (22.5) | 1,809,418 (24.3) |
| 76th-100th percentile | 122,630 (19.4) | 571,451 (18.6) | 1,734,281 (23.3) |
a
For all comparisons, statistical significance was P<.001.